Messages in this thread Patch in this message | | | From | Markus Pargmann <> | Subject | [PATCH v3 3/4] regmap: Add raw_write/read checks for max_raw_write/read sizes | Date | Thu, 27 Aug 2015 08:44:31 +0200 |
| |
Check in regmap_raw_read() and regmap_raw_write() for correct maximum sizes of the operations. Return -E2BIG if this size is not supported because it is too big.
Also this patch causes an uninitialized variable warning so it initializes ret (although not necessary).
Signed-off-by: Markus Pargmann <mpa@pengutronix.de> --- drivers/base/regmap/regmap.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index b4d12fe15f21..157fe79a7d06 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1581,6 +1581,8 @@ int regmap_raw_write(struct regmap *map, unsigned int reg, return -EINVAL; if (val_len % map->format.val_bytes) return -EINVAL; + if (map->max_raw_write && map->max_raw_write > val_len) + return -E2BIG; map->lock(map->lock_arg); @@ -2253,6 +2255,10 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, ret = -ENOTSUPP; goto out; } + if (map->max_raw_read && map->max_raw_read < val_len) { + ret = -E2BIG; + goto out; + } /* Physical block read if there's no cache involved */ ret = _regmap_raw_read(map, reg, val, val_len); -- 2.5.0
| |